Many of the tyres are blended into road surfaces or burned in cement kilns .
许多轮胎埋在路旁或在水泥窑里焚烧。
Epa estimated the rules would slash mercury emissions from the kilns by 81 percent to 93 percent .
环境署估计此项法规会将水泥窑排放的汞减少81%-93%。
All the while , the number of noxious steel mills , cement kilns and power plants relentlessly increases .
同时，有毒的钢厂，水泥窑及发电厂的数量还在不断增加。
In addition , china is eventually planning to retool its economy so it is less reliant on heavy industry like steel mills and cement kilns , which generate a lot of output with few workers .
Earthjustice , an environmental law firm in washington , d.c. , filed lawsuits over more than a decade on behalf of local activist groups to get epa to regulate mercury from cement kilns .
